My car wont stop comming from a high speed. My brother told me the brakes are as solid as rock. We pushed my car till 3rd gear and we tried to stop with engine break and it slows down very slow. It's has been like this for quiet sometime now after i changed the front brakes. My brother told me it was ceramic pad. We bled it again today and it still slows down really slow and the brakes are hard. Could it be bad brake pads? Brake lines? The back break pads are good. any ideas?